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What are major elements of a cell ?


Carbon, hydrogen, oxygen and nitrogen are the major elements of a cell.
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What is the general formula of carbohydrates ?

The carbohydrate has a general formula - CnH2nOn Or (CH2O)n.
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Name the substance that forms the exoskeleton of insects and prawns.

Chitin.
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Name the structural protein in the cell wall of pollen grains.

Sporopollenin.
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Suggest the name of an animal starch.

Glycogen.
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